Low-damage high-efficiency diamond grinding wheel trimming machine and trimming method thereof

Abstract

The invention belongs to the technical field of diamond grinding wheel trimming, and particularly relates to a low-damage and high-efficiency diamond grinding wheel trimming machine and a trimming method thereof. The machine tool comprises a machine tool base, a hard grinding wheel dressing mechanism, a flexible grinding wheel dressing mechanism and a grinding wheel transferring mechanism. The hard grinding wheel dressing mechanism adopts a hard grinding wheel to perform opposite grinding processing on the to-be-dressed grinding wheel; the flexible grinding wheel dressing mechanism adopts a flexible grinding wheel formed by magnetorheological fluid to grind and process the grinding wheel to be dressed; the grinding wheel transferring mechanism fixes and transfers a grinding wheel to be dressed through an air floating shaft and the three-axis moving mechanism. The grinding wheel to be dressed can be subjected to shaping and sharpening integrated machining through the combined technology of hard grinding wheel opposite grinding and flexible grinding wheel grinding, and the technical effects of being high in dressing efficiency and small in hard damage are achieved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of diamond grinding wheel dressing, and particularly relates to a low-damage high-efficiency diamond grinding wheel dressing machine and a dressing method thereof. BACKGROUND

[0002] The dressing of a diamond grinding wheel includes two steps of dressing and sharpening which are different and related. The purpose of dressing is to keep the grinding wheel in correct geometric shape (roundness, flatness) and dimensional accuracy, and the purpose of sharpening is to selectively remove the bond of the grinding wheel so that the diamond abrasive grains protrude to keep proper sharpness.

[0003] The commonly used mechanical dressing methods such as diamond tool dressing method, ordinary grinding wheel grinding method and free abrasive grinding method have the defects of low dressing accuracy and serious damage to the grinding wheel. In order to solve this problem, a series of special dressing methods such as electric spark dressing, electrolytic dressing, ultrasonic vibration dressing and laser dressing have been developed at home and abroad. The electric spark dressing method has high dressing accuracy but slow dressing speed; the electrolytic dressing method is fast but difficult to dress; the laser dressing method has good sharpening effect but poor dressing accuracy and high cost; the ultrasonic vibration method has low dressing efficiency. SUMMARY

[0004] Therefore, the application provides a low-damage high-efficiency diamond grinding wheel dressing machine and a dressing method thereof to solve all or part of the technical problems described in the background.

[0005] The innovative idea of the application is that: 1. the to-be-dressed grinding wheel is dressed by adopting the combined process of hard grinding wheel pairing and flexible grinding wheel grinding; and 2. the to-be-dressed grinding wheel is fixed by adopting air floating shaft to reduce the hard damage between the to-be-dressed grinding wheel and the pairing grinding wheel in the pairing process.

[0006] The solution provided by the application to solve the technical problems is as follows: The low-damage high-efficiency diamond grinding wheel dressing machine comprises a machine tool base, a hard grinding wheel dressing mechanism, a flexible grinding wheel dressing mechanism and a grinding wheel transfer mechanism; the hard grinding wheel dressing mechanism is used for pairing and grinding the to-be-dressed grinding wheel; the flexible grinding wheel dressing mechanism is used for grinding the to-be-dressed grinding wheel by adopting the flexible grinding wheel formed by the magnetorheological liquid; and the grinding wheel transfer mechanism is used for fixing and transferring the to-be-dressed grinding wheel by adopting the air floating shaft and the three-axis moving mechanism.

[0007] Preferably, the machine tool base comprises an upper workbench and a lower workbench; the upper workbench is provided with a ground hole; the hard grinding wheel dressing mechanism and the grinding wheel transfer mechanism are arranged on the upper workbench; the flexible grinding wheel dressing mechanism is arranged on the lower workbench; and the grinding wheel transfer mechanism can feed the to-be-dressed grinding wheel to the flexible grinding wheel dressing mechanism through the ground hole.

[0008] Preferably, the hard grinding wheel dressing mechanism comprises a base, a counter grinding wheel shaft, a counter grinding wheel, and a counter grinding motor; the base is arranged on the upper workbench, the counter grinding wheel is arranged on the base through a bearing seat and is driven by the counter grinding motor; the counter grinding wheel is fixed on the counter grinding wheel shaft.

[0009] Preferably, the flexible grinding wheel dressing mechanism comprises a magnetorheological grinding groove, an upper side electromagnetic group, a lower side electromagnetic group, and a bottom annular electromagnetic; the upper side electromagnetic group is arranged on the upper side wall of the magnetorheological grinding groove and can form an electromagnetic field in the upper side of the magnetorheological grinding groove; the lower side electromagnetic group is arranged on the lower side wall of the magnetorheological grinding groove and can form an electromagnetic field in the lower side of the magnetorheological grinding groove; the bottom annular electromagnetic is arranged on the bottom of the magnetorheological grinding groove and can form an annular electromagnetic field in the magnetorheological grinding groove.

[0010] Preferably, the bottom annular electromagnetic comprises an outer ring and an inner ring; the outer ring and the inner ring are both provided with wire windings and have opposite polarities at the same end.

[0011] Preferably, the flexible grinding wheel dressing mechanism further comprises a grinding motor, a grinding groove driving shaft, and a grinding shaft shielding cover; the grinding motor is arranged on the lower workbench, the two ends of the grinding groove driving shaft are respectively connected to the magnetorheological grinding groove and the power output end of the grinding motor, the grinding shaft shielding cover is arranged between the magnetorheological grinding groove and the grinding motor, and the grinding groove driving shaft passes through the grinding shaft shielding cover and the bottom annular electromagnetic. Further, the flexible grinding wheel dressing mechanism further comprises a tray; the bottom annular electromagnetic is arranged on the tray, and the grinding shaft shielding cover and the grinding groove driving shaft pass through the tray.

[0012] Preferably, the grinding wheel transfer mechanism comprises an expansion mandrel, an air floating shaft, an air floating bearing, an air floating shaft motor, a motor support, and a three-axis moving mechanism; the three-axis moving mechanism comprises an X-axis moving mechanism, a Y-axis moving mechanism, and a Z-axis moving mechanism; the motor support is arranged on the Z-axis moving mechanism, the air floating bearing and the air floating shaft motor are arranged on the motor support, the air floating shaft is arranged in the air floating bearing and is driven by the air floating shaft motor; the expansion mandrel is arranged at the end of the air floating shaft.

[0013] Preferably, the grinding wheel transfer mechanism further comprises a side swing platform; the side swing platform is arranged on the Z-axis moving mechanism, and the motor support is arranged on the side swing platform; the side swing platform comprises a fixed seat, an adjusting seat, a driving lead screw, a threaded hole sliding block, and a push-pull arm; the adjusting seat is hinged to the fixed seat, the driving lead screw is arranged on the fixed seat through a bearing seat, the threaded hole sliding block is arranged on the driving lead screw through thread cooperation, and the two ends of the push-pull arm are respectively hinged to the adjusting seat and the threaded hole sliding block.

[0014] Preferably, the low-damage high-efficiency diamond grinding wheel trimming machine further comprises a shielding window mechanism; the shielding window mechanism comprises a translation window plate, a translation rack, a translation gear and a gear motor; the translation rack is fixed on the translation window plate, and the gear motor is power output to the translation gear; a window plate groove is arranged around the ground hole of the upper workbench; the rack motor is arranged in the window plate groove, and the translation gear is engaged to the translation rack.

[0015] The trimming method of the foregoing various low-damage high-efficiency diamond grinding wheel trimming machines comprises the following process steps: A hard grinding wheel pair grinding step is adopted to perform pair grinding processing on the grinding wheel to be trimmed; A flexible grinding wheel trimming step is adopted to perform grinding processing on the grinding wheel to be trimmed by using a flexible grinding wheel formed by a magnetorheological fluid; Wherein: the grinding wheel to be trimmed is fixed by using an air floating shaft.

[0016] Beneficial technical effects: The low-damage high-efficiency trimming machine and the trimming method thereof disclosed in the present application can perform shaping and sharpening integrated processing on the grinding wheel to be trimmed through the combined process of hard grinding wheel pair grinding and flexible grinding wheel grinding, and have the technical effects of high trimming efficiency and small hard damage.

[0017] The technical solutions and technical effects of the present application are described in detail below in combination with the accompanying drawings and specific embodiments. DETAILED DESCRIPTION

[0018] Figure 1 : Low-damage high-efficiency diamond grinding wheel trimming machine perspective view; Figure 2 : Low-damage high-efficiency diamond grinding wheel trimming machine side perspective view; Figure 3 : Three-axis moving mechanism structure schematic view; Figure 4 : Side swing platform structure schematic view; Figure 5 : Flexible grinding wheel trimming mechanism top perspective view; Figure 6 : Ring-shaped electromagnet structure schematic view; Figure 7 : Shielding window mechanism structure schematic view.

[0019] Figure legend: 1- machine tool base; 11- upper workbench, 12- lower workbench, 13- ground hole, 14- window plate groove; 2- hard grinding wheel trimming mechanism; 21- base, 22- pair grinding wheel shaft, 23- pair grinding wheel, 24- pair grinding motor; 3-Flexible grinding wheel dressing mechanism; 31-Magnetorheological grinding groove; 32-Upper side electromagnet assembly; 33-Lower side electromagnet assembly; 34-Bottom annular electromagnet; 35-Grinding motor; 36-Grinding groove drive shaft; 37-Grinding shaft shield; 38-Tray; 341-Outer ring; 342-Inner ring; 4-Grinding wheel transfer mechanism; 41-Expansion spindle; 42-Air bearing; 43-Air bearing; 44-Air bearing motor; 45-Motor bracket; 46-Three-axis moving mechanism; 47-Side swing platform; 461-X-axis moving mechanism, 462-Y-axis moving mechanism, 463-Z-axis moving mechanism; 471-Fixed base, 472-Adjusting base, 473-Drive screw, 474-Screw hole slider, 475-Push-pull arm; 5-Shielding window mechanism; 51-Sliding window panel; 52-Sliding rack; 53-Sliding gear; 54-Gear motor. Detailed Implementation

[0020] Please see Figures 1 to 7 The low-damage, high-efficiency diamond grinding wheel dressing machine includes a machine base 1, a hard grinding wheel dressing mechanism 2, a flexible grinding wheel dressing mechanism 3, and a grinding wheel transfer mechanism 4.

[0021] The hard grinding wheel dressing mechanism 2 uses a hard grinding wheel to grind the grinding wheel to be dressed; the flexible grinding wheel dressing mechanism 3 uses a flexible grinding wheel formed by magnetorheological fluid to grind the grinding wheel to be dressed; the grinding wheel transfer mechanism 4 uses an air-bearing shaft 42 to fix the grinding wheel to be dressed and uses a three-axis moving mechanism 46 to feed and transfer the grinding wheel.

[0022] The machine tool base 1 includes an upper worktable 11 and a lower worktable 12; the upper worktable 11 is provided with a ground hole 13; the hard grinding wheel dressing mechanism 2 and the grinding wheel transfer mechanism 4 are provided on the upper worktable 11; the flexible grinding wheel dressing mechanism 3 is provided on the lower worktable 12; the grinding wheel transfer mechanism 4 can feed the grinding wheel to be dressed to the flexible grinding wheel dressing mechanism 3 through the ground hole 13.

[0023] Hard grinding wheel grinding process: First, fix the grinding wheel to be dressed on the expansion mandrel 41 of the grinding wheel transfer mechanism 4; Then start the grinding motor 24 and the air-bearing shaft motor 44; Then, the three-axis moving mechanism 46 begins to feed and grind the surface.

[0024] During the grinding process, the elastic air cushion of the air bearing 43 will generate a certain amount of displacement when the grinding wheel 23 and the grinding wheel to be dressed make hard contact (such as when abrasive grains collide), thus buffering the hard wear of the grinding wheel. Compared with existing mechanical dressing methods, it has the advantages of high grinding wheel efficiency and low wear.

[0025] Flexible grinding wheel grinding process: After grinding is completed, the three-axis moving mechanism 46 drives the grinding wheel to move and immerse the grinding wheel into the magnetorheological grinding groove 31 of the flexible grinding wheel dressing mechanism 3. Then, a suitable sorting magnetic field is turned on to solidify the corresponding parts of the magnetorheological fluid in the magnetorheological grinding tank 31; Next, start the air-bearing shaft motor 44 and the grinding motor 35 to begin flexible grinding with the grinding wheel.

[0026] During the grinding process, the intensity of the sorting magnetic field is adjusted according to the type of grinding wheel to regulate the grinding force of the flexible grinding wheel. Because the solidification chain of the magnetorheological fluid itself has a certain degree of elasticity, it can actively avoid hard grinding of the diamond abrasive grains and selectively remove the bonding agent from the grinding wheel. Therefore, the sharpening process of the grinding wheel to be dressed can be achieved using the same method and efficiency as mechanical grinding. Compared with existing electrical discharge machining methods, it has higher dressing efficiency and better selectivity, without damaging the abrasive grains themselves.

[0027] The hard grinding wheel dressing mechanism 2 includes a base 21, a grinding wheel shaft 22, a grinding wheel 23, and a grinding motor 24. The base 21 is set on the upper worktable 11, the grinding wheel shaft 22 is set on the base 21 through a bearing seat and is driven by the grinding motor 24, and the grinding wheel 23 is fixed on the grinding wheel shaft 22.

[0028] The flexible grinding wheel dressing mechanism 3 includes a magnetorheological grinding groove 31, an upper electromagnet assembly 32, a lower electromagnet assembly 33, and a bottom annular electromagnet 34. The upper electromagnet assembly 32 is located on the upper side of the magnetorheological grinding groove 31 and can form an electromagnetic field in the upper side of the magnetorheological grinding groove 31. The lower electromagnet assembly 33 is located on the lower side of the magnetorheological grinding groove 31 and can form an electromagnetic field in the lower side of the magnetorheological grinding groove 31. The bottom annular electromagnet 34 is located at the bottom of the magnetorheological grinding groove 31 and can form an annular electromagnetic field inside the magnetorheological grinding groove 31.

[0029] The bottom annular electromagnet 34 includes an outer ring 341 and an inner ring 342. Both the outer ring 341 and the inner ring 342 are equipped with wire windings, with opposite polarities at the same end. When conducting electricity, the magnetic fields formed inside the inner ring 342 cancel each other out, forming an annular magnetic field pointing from the inner ring 342 to the outer ring 341. This annular magnetic field enables the magnetic field coverage area of ​​the magnetorheological fluid in the magnetorheological grinding tank 31 to form an annular flexible grinding wheel. This annular flexible grinding wheel is used to grind and dress the outer circumference of the grinding wheel to be dressed. When the three-axis moving mechanism 46 drives the grinding wheel to be dressed to feed towards the flexible grinding wheel, the grinding force gradually increases as it passes through the liquid zone, transition zone, and solidification zone.

[0030] The upper electromagnet group 32 and the lower electromagnet group 33 are used to form strip-shaped solidification areas at the upper and lower edges of the magnetorheological grinding groove 31, respectively, to complete the flexible grinding process on both sides of the grinding wheel to be dressed.

[0031] When the grinding wheel to be dressed has a tilted working surface, the tilting mechanism 47 of the grinding wheel transfer mechanism 4 is used to drive the grinding wheel to be dressed to make tilt adjustment.

[0032] The flexible grinding wheel dressing mechanism 3 also includes a grinding motor 35, a grinding groove drive shaft 36, a grinding shaft shield 37, and a tray 38. The grinding motor 35 is mounted on the lower worktable 12. The two ends of the grinding groove drive shaft 36 are connected to the magnetorheological grinding groove 31 and the power output end of the grinding motor 35, respectively. The grinding shaft shield 37 is positioned between the magnetorheological grinding groove 31 and the grinding motor 35. The grinding groove drive shaft 36 passes through the grinding shaft shield 37 and the bottom annular electromagnet 34. The bottom annular electromagnet 34 is mounted on the tray 38, and the grinding groove drive shaft 36 and the grinding shaft shield 37 pass through the tray 38.

[0033] The grinding motor 35 can drive the magnetorheological grinding tank 31 to rotate to achieve flexible grinding. An annular guide rail pair can be set between the magnetorheological grinding tank 31, the grinding shaft shield 37, and the bottom annular electromagnet 34 to increase the smoothness of the rotational motion.

[0034] The grinding wheel transfer mechanism 4 includes an expansion mandrel 41, an air-bearing shaft 42, an air-bearing bearing 43, an air-bearing shaft motor 44, a motor bracket 45, a three-axis moving mechanism 46, and a side-swinging platform 47.

[0035] Please see Figure 3 The three-axis moving mechanism 46 includes an X-axis moving mechanism 461, a Y-axis moving mechanism 462, and a Z-axis moving mechanism 463.

[0036] Please see Figure 4 The side-swing platform 47 includes a fixed base 471, an adjusting base 472, a drive screw 473, a screw hole slider 474, and a push-pull arm 475. The adjusting base 472 is hinged to the fixed base 471, the drive screw 473 is mounted on the fixed base 471 through a bearing seat, the screw hole slider 474 is mounted on the drive screw 473 through a threaded engagement, and the two ends of the push-pull arm 475 are respectively hinged to the adjusting base 472 and the screw hole slider 474.

[0037] The fixed seat 471 of the side swing platform 47 is set on the Z-axis moving mechanism 463, and the motor bracket 45 is set on the adjusting seat 472 of the side swing platform 47; the air bearing 43 and the air shaft motor 44 are set on the motor bracket 45, the air shaft 42 is set in the air bearing 43 and driven by the air shaft motor 44; the expansion spindle 41 is set at the end of the air shaft 42.

[0038] The expansion mandrel 41 is used to fix the grinding wheel to be dressed, and the side swing platform 47 is used to adjust the tilt angle of the grinding wheel to adapt to the flexible winding wheel; the drive screw 473 can be manually adjusted by a handle or automatically adjusted by a drive motor.

[0039] In a modified embodiment, the low-damage, high-efficiency diamond grinding wheel dressing machine disclosed in this application further includes a shielding window mechanism 5; the shielding window mechanism 5 is used to seal the ground hole 13 to prevent impurities from entering the magnetorheological fluid.

[0040] Please see Figure 7 The shielding window mechanism 5 includes a sliding window plate 51, a sliding rack 52, a sliding gear 53, and a gear motor 54. The sliding rack 52 is fixed on the sliding window plate 51, and the gear motor 54 outputs power to the sliding gear 53. A window plate groove 14 is provided around the ground hole 13 of the upper worktable 11. The rack motor 53 is located in the window plate groove 14, and the sliding gear 53 meshes with the sliding rack 52. When the gear motor 54 is running, it can drive the sliding window plate 51 to close or open the ground hole 13 through the engagement of the rack and gear.

[0041] The dressing method of the aforementioned low-damage, high-efficiency diamond grinding wheel dressing machine includes the following process steps: The hard grinding wheel grinding step involves using a hard grinding wheel (grinding wheel 23) to grind the grinding wheel to be dressed. The flexible grinding wheel dressing step involves using a flexible grinding wheel formed by magnetorheological fluid to grind the grinding wheel to be dressed. Among them, the grinding wheel to be dressed is fixed by an air-bearing shaft.

[0042] If the grinding wheel to be dressed has an outer circumferential working surface and two working surfaces on both sides; the dressing process is as follows: First, fix the grinding wheel onto the expansion mandrel 41, and then move the air-bearing shaft 42 to immerse the grinding wheel into the magnetorheological grinding tank 31; The bottom annular electromagnet 34 is connected to the magnetorheological grinding groove 31 to form a flexible annular grinding wheel. At the same time, the air-bearing shaft 42 is moved to bring the outer circumference of the grinding wheel into contact with the flexible grinding wheel. Then the air-bearing shaft motor 44 is started to grind and repair the outer circumferential working surface. Then, the upper electromagnet group 32 is activated to form a "flexible oilstone strip" in the upper part of the magnetorheological grinding groove 31; the air-bearing shaft 42 rises to make the upper working surface of the grinding wheel contact the "flexible oilstone strip" to dress the upper working surface of the grinding wheel. The finishing steps for the lower working face are similar to those for the upper working face, and will not be repeated here.

[0043] As described above, using flexible grinding wheels or flexible whetstones formed by the localized curing of magnetorheological fluid for diamond grinding wheel dressing can improve the existing hard grinding wheel grinding process into a process involving both hard and flexible grinding wheels. This achieves both high grinding dressing efficiency and avoids hard damage to the grinding wheel. Furthermore, by adjusting the intensity of the sorting magnetic field, the flexible grinding wheel or whetstone can selectively remove the bonding material from the grinding wheel, thus achieving both shaping and sharpening with high precision and low wear.

[0044] The technical solutions and effects of this application have been described in detail above with reference to the accompanying drawings and specific embodiments. It should be noted that those skilled in the art can develop other embodiments based on this. Any simple modifications and equivalent substitutions that do not depart from the innovative concept of this application are covered by this application and fall within the protection scope of this patent.

Claims

1. A low-damage, high-efficiency diamond grinding wheel dressing machine, characterized in that: It includes a machine tool base (1), a hard grinding wheel dressing mechanism (2), a flexible grinding wheel dressing mechanism (3), and a grinding wheel transfer mechanism (4); The hard grinding wheel dressing mechanism (2) uses a hard grinding wheel to perform grinding on the grinding wheel to be dressed; The flexible grinding wheel dressing mechanism (3) uses a flexible grinding wheel formed by magnetorheological fluid to grind the grinding wheel to be dressed. The grinding wheel transfer mechanism (4) fixes and transfers the grinding wheel to be dressed by means of an air-bearing shaft and a three-axis moving mechanism.

2. The low-damage, high-efficiency diamond grinding wheel dressing machine according to claim 1, characterized in that: The machine tool base (1) includes an upper worktable (11) and a lower worktable (12); the upper worktable (11) is provided with a ground hole (13); The hard grinding wheel dressing mechanism (2) and the grinding wheel transfer mechanism (4) are mounted on the upper worktable (11); The flexible grinding wheel dressing mechanism (3) is mounted on the lower worktable (12); The grinding wheel transfer mechanism (4) can feed the grinding wheel to be dressed to the flexible grinding wheel dressing mechanism (3) through the ground hole (13).

3. The low-damage, high-efficiency diamond grinding wheel dressing machine according to claim 2, characterized in that: The hard grinding wheel dressing mechanism (2) includes a base (21), a grinding wheel shaft (22), a grinding wheel (23), and a grinding wheel drive motor (24). The base (21) is mounted on the upper worktable (11), and the grinding wheel shaft (22) is mounted on the base (21) through a bearing seat and driven by the grinding wheel drive motor (24). The grinding wheel (23) is fixed on the grinding wheel shaft (22).

4. The low-damage, high-efficiency diamond grinding wheel dressing machine according to claim 2, characterized in that: The flexible grinding wheel dressing mechanism (3) includes a magnetorheological grinding groove (31), an upper electromagnet group (32), a lower electromagnet group (33), and a bottom annular electromagnet (34). The upper electromagnet assembly (32) is disposed on the upper side of the magnetorheological grinding groove (31) and can form an electromagnetic field in the upper side orientation of the magnetorheological grinding groove (31). The lower electromagnet assembly (33) is disposed on the lower side of the magnetorheological grinding groove (31) and can generate an electromagnetic field in the lower side of the magnetorheological grinding groove (31). The bottom annular electromagnet (34) is located at the bottom of the magnetorheological grinding groove (31) and can form an annular electromagnetic field in the magnetorheological grinding groove (31).

5. The low-damage, high-efficiency diamond grinding wheel dressing machine according to claim 4, characterized in that: The bottom annular electromagnet (34) includes an outer ring (341) and an inner ring (342). Both the outer ring (341) and the inner ring (342) are provided with wire windings, and the polarities of the same end are opposite.

6. The low-damage, high-efficiency diamond grinding wheel dressing machine according to claim 4, characterized in that: The flexible grinding wheel dressing mechanism (3) also includes a grinding motor (35), a grinding groove drive shaft (36), and a grinding shaft shield (37). The grinding motor (35) is mounted on the lower worktable (12). The two ends of the grinding tank drive shaft (36) are respectively connected to the power output ends of the magnetorheological grinding tank (31) and the grinding motor (35). The grinding shaft shield (37) is mounted between the magnetorheological grinding tank (31) and the grinding motor (35). The grinding tank drive shaft (36) passes through the grinding shaft shield (37) and the bottom annular electromagnet (34).

7. The low-damage, high-efficiency diamond grinding wheel dressing machine according to claim 2, characterized in that: The grinding wheel transfer mechanism (4) includes an expansion mandrel (41), an air-bearing shaft (42), an air-bearing bearing (43), an air-bearing shaft motor (44), a motor bracket (45), and a three-axis moving mechanism (46). The three-axis moving mechanism (46) includes an X-axis moving mechanism (461), a Y-axis moving mechanism (462), and a Z-axis moving mechanism (463). The motor bracket (45) is mounted on the Z-axis moving mechanism (463), the air bearing (43) and the air shaft motor (44) are mounted on the motor bracket (45), the air shaft (42) is mounted inside the air bearing (43) and driven by the air shaft motor (44); the expansion spindle (41) is mounted at the end of the air shaft (42).

8. The low-damage, high-efficiency diamond grinding wheel dressing machine according to claim 7, characterized in that: The grinding wheel transfer mechanism (4) also includes a side-swing platform (47). The side-swing platform (47) is mounted on the Z-axis moving mechanism (463), and the motor bracket (45) is mounted on the side-swing platform (47); The side-swing platform (47) includes a fixed seat (471), an adjusting seat (472), a drive screw (473), a screw hole slider (474), and a push-pull arm (475). The adjusting seat (472) is hinged to the fixed seat (471), the driving screw (473) is mounted on the fixed seat (471) through a bearing seat, the screw hole slider (474) is mounted on the driving screw (473) through a threaded fit, and the two ends of the push-pull arm (475) are respectively hinged to the adjusting seat (472) and the screw hole slider (474).

9. The low-damage, high-efficiency diamond grinding wheel dressing machine according to claim 2, characterized in that: The low-damage, high-efficiency diamond grinding wheel dressing machine also includes a shielding window mechanism (5); The shielding window mechanism (5) includes a sliding window plate (51), a sliding rack (52), a sliding gear (53), and a gear motor (54); The translation rack (52) is fixed on the translation window plate (51), and the gear motor (54) outputs power to the translation gear (53). A window panel groove (14) is provided around the ground hole (13) of the upper workbench (11). The rack motor (53) is disposed in the window plate groove (14) and the translation gear (53) meshes with the translation rack (52).

10. Dressing methods for low-damage, high-efficiency diamond grinding wheel dressers, including: The hard grinding wheel grinding step involves using a hard grinding wheel to grind the grinding wheel to be dressed. The flexible grinding wheel dressing step involves using a flexible grinding wheel formed by magnetorheological fluid to grind the grinding wheel to be dressed. Among them, the grinding wheel to be dressed is fixed by an air-bearing shaft.

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